<!DOCTYPE html><meta name="viewport" content="width=device-width, initial-scale=1" />
<style>
    body {
        margin: 0;
    }
    .container {
        position: relative;
        overflow: hidden;
        width: 100vw;
        height: 100vh;
    }
    .video {
        position: absolute;
        width: 100vw;
        height: 100vh;
    }
</style>
<div class="container"><div class="video" id="player"></div></div>
<script>
  const url = new URL(window.location)
  const viewport = document.querySelector("meta[name=viewport]")

  const tag = document.createElement("script")
  tag.src = "https://www.youtube.com/iframe_api"
  const firstScriptTag = document.getElementsByTagName('script')[0];
  firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

  let player
  function onYouTubeIframeAPIReady() {
    player = new YT.Player('player', {
      width: "1000",
      height: "1000",
      videoId: url.searchParams.get('videoId'),
      playerVars: {
        autoplay: 1,
        start: url.searchParams.get('start'),
        rel: 0,
        loop: 0,
        playsinline: 1,
        origin: url.origin
      },
    });
  }
  function onPlayerReady(event) {
    event.target.playVideo();
  }
</script>
